Symptoms This hotfix addresses two specific symptoms:  Time-out errors occur in Volume Shadow Copy service writers. Shadow copies are lost during backup and during times when there are high levels of input/output. Time-out errors occur in Volume Shadow Copy service writers Sometimes, during the backup process, some Volume Shadow Copy service writers might fail because of time-out errors that cause the backup to fail. A Volume Shadow Copy service writer is a program or a service that uses Volume Shadow Copy service to save information to a shadow copy storage area. For example, when you use the NTBackup program, the backup may not be successful, and you may receive the…

DiskShadow list writers status vssadmin resize shadowstorage The shadow copy storage area (or “diff area”) is the location where the data for the shadow copy that is created by the system software provider is stored. The diff area can be located on any local volume. However, it must be located on an NTFS volume that has enough space to store it.

Critical Components If a critical component fails during the backup of system state, the backup job fails with an error code as the backed up data is not sufficient for a restore of the operating system. Active Directory ASR Cluster Database Registry System Info Archive System Protected Files System Volume Non-Critical Components If a non-critical component fails during the backup of system state, the backup job completes with an error code as the backed up data is sufficient for a restore of the operating system. However, the non-critical components do not get restored. Active Directory Application Mode (ADAM) BITS service Certificate services COM+ database Content indexing catalogs DDR explicit content…

Cause This issue occurs because the registry path to Eventcls.dll is incorrect or because the registry data type for the TypeLib setting is incorrect. To resolve this issue, perform the following steps. Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in…

In order to enable VSS based backups of Hyper-V VMs using Windows Server Backup, you must add the following registry keys to register the Hyper-V VSS Writer with Windows Server Backup. HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT \CurrentVersion\WindowsServerBackup\Application Support\{66841CD4-6DED-4F4B-8F17-FD23F8DDC3DE} Once you have the keys listed above created, you will need to create a String Value with the following. Name: Application Identifier Type: REG_SZ Value: Hyper-V

Volume Snapshot Services (VSS) was and remains a good addition to the Windows OS. Without going into a lot of detail, this technology coordinates various components to ensure stable point-in-time backups even while applications may be running. Typically, this occurs successfully with only minimal interruption to the application. On occasion there can be problems taking backups of systems that result from configuration issues, missing fixes, to third-party providers and writers that need updates. VSS really does a lot during the course of a normal backup. There are a couple of points during the process that actions must be timely. Failure of components to complete I/O within the allotted time results…